Patent Search Website |
Illustration |
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www.uspto.gov |
US patent search: Patents after 1970 provide full text search. The search engine of the website is powerful, but a user cannot download multiple patent image files at a time. The following two websites should be used together with this website. |
free |
www.freepatentsonline.com |
US, EP patent search (including JP patents in the future): a user can download multiple PDF image files at a time. |
free |
www.pat2pdf.org |
A user can input a patent number to download the PDF image file of the full text of a US patent specification from this website. |
free |
www.google.com/patents |
US patent search. It allows a user to see patent images promptly. |
free |
ep.espacenet.com |
EP patent searches: Besides EP patents, the website includes US, JP, German, UK, French, and PCT patents, but it only provides searches for the abstract of a patent specification. |
free |
www.ipdl.inpit.go.jp/homepg.ipdl |
IPDL (Industrial Property Digital Library) of Japan: interface in Japanese or English. The website mainly provides JP patent searches. A user can download a PDF full-text file with the Japanese search interface. A user who is not familiar with Japanese should click English patent abstract search (PAJ). |
free |
www.jpo.go.jp/sitemap_e |
JP patent search (providing English searches for patent abstracts). The website is a site map of the Japan Patent Office. Click through to a search on IPDL (Industrial Property Digital Library). On IPDL, click search by way of PAJ. |
free |
www.surfip.gov.sg |
Singaporean worldwide patent database: including Singapore, US, UK, PCT, Taiwan, and China |
free |
www.delphion.com |
Delphion worldwide patent database, including US, PCT, EP, and JP patents. The special features of Delphion are the patent family and the legal status. |
pay |
www.sipo.gov.cn/sipo/zljs |
China patent searches. It does not provide full text searches. |
free |
twpat.tipo.gov.tw/tipotwoc/tipotwkm |
Taiwan patent searches, providing key-word and full-text searches. A user can download a full-text PDF file from the website. |
free |
www.wipo.int/pctdb/en |
PCT patent searches |
free |
eng.kipris.or.kr |
Korean patent searches |
free |
search.cnpat.com.cn/Search/CN |
Chinese patent database search system |
free |
http://www.soopat.com/ |
Worldwide patent search. A user can perform full-text searches, download a full-text file, and search for patent families. |
free |
www.wikipatents.com |
A user can search for and download US, JP, UK, German, and Canadian patents from the website. |
pay |
www.drugfuture.com/cnpat/cn_patent.asp |
A user can download multiple Chinese patents at a time. |
free |
pat365.com/search.jsp |
Focusing on China, HK, and Taiwan patent cases of invention or utility models. |
free |
